ovl: free lower_mnt array in ovl_put_super
Orabug:
22641588
commit
5ffdbe8bf1e485026e1c7e4714d2841553cf0b40 upstream.
This fixes memory leak after umount.
Kmemleak report:
unreferenced object 0xffff8800ba791010 (size 8):
comm "mount", pid 2394, jiffies
4294996294 (age 53.920s)
hex dump (first 8 bytes):
20 1c 13 02 00 88 ff ff .......
backtrace:
[<
ffffffff811f8cd4>] create_object+0x124/0x2c0
[<
ffffffff817a059b>] kmemleak_alloc+0x7b/0xc0
[<
ffffffff811dffe6>] __kmalloc+0x106/0x340
[<
ffffffffa0152bfc>] ovl_fill_super+0x55c/0x9b0 [overlay]
[<
ffffffff81200ac4>] mount_nodev+0x54/0xa0
[<
ffffffffa0152118>] ovl_mount+0x18/0x20 [overlay]
[<
ffffffff81201ab3>] mount_fs+0x43/0x170
[<
ffffffff81220d34>] vfs_kern_mount+0x74/0x170
[<
ffffffff812233ad>] do_mount+0x22d/0xdf0
[<
ffffffff812242cb>] SyS_mount+0x7b/0xc0
[<
ffffffff817b6bee>] entry_SYSCALL_64_fastpath+0x12/0x76
[<
ffffffffffffffff>] 0xffffffffffffffff
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Fixes: dd662667e6d3 ("ovl: add mutli-layer infrastructure")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit
5c418f1bde8deab2ab636d64d4e8465bc22b0bb8)
Signed-off-by: Dan Duval <dan.duval@oracle.com>